package net.minecraft.command;

import java.util.List;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.BlockPos;
import net.minecraft.util.ChatComponentTranslation;
import net.minecraft.util.IChatComponent;
import net.minecraft.world.WorldSettings;

public class CommandGameMode extends CommandBase {
	/**
	 * Gets the name of the command
	 */
	public String getCommandName() {
		return "gamemode";
	}

	/**
	 * Return the required permission level for this command.
	 */
	public int getRequiredPermissionLevel() {
		return 2;
	}

	/**
	 * Gets the usage string for the command.
	 */
	public String getCommandUsage(ICommandSender sender) {
		return "commands.gamemode.usage";
	}

	/**
	 * Callback when the command is invoked
	 */
	public void processCommand(ICommandSender sender, String[] args) throws CommandException {
		if (args.length <= 0) {
			throw new WrongUsageException("commands.gamemode.usage", new Object[0]);
		} else {
			WorldSettings.GameType worldsettings$gametype = this.getGameModeFromCommand(sender, args[0]);
			EntityPlayer entityplayer = args.length >= 2 ? getPlayer(sender, args[1])
					: getCommandSenderAsPlayer(sender);
			entityplayer.setGameType(worldsettings$gametype);
			entityplayer.fallDistance = 0.0F;

			if (sender.getEntityWorld().getGameRules().getBoolean("sendCommandFeedback")) {
				entityplayer.addChatMessage(new ChatComponentTranslation("gameMode.changed", new Object[0]));
			}

			IChatComponent ichatcomponent = new ChatComponentTranslation("gameMode." + worldsettings$gametype.getName(),
					new Object[0]);

			if (entityplayer != sender) {
				notifyOperators(sender, this, 1, "commands.gamemode.success.other",
						new Object[] { entityplayer.getName(), ichatcomponent });
			} else {
				notifyOperators(sender, this, 1, "commands.gamemode.success.self", new Object[] { ichatcomponent });
			}
		}
	}

	/**
	 * Gets the Game Mode specified in the command.
	 */
	protected WorldSettings.GameType getGameModeFromCommand(ICommandSender p_71539_1_, String p_71539_2_)
			throws CommandException, NumberInvalidException {
		return !p_71539_2_.equalsIgnoreCase(WorldSettings.GameType.SURVIVAL.getName())
				&& !p_71539_2_.equalsIgnoreCase("s")
						? (!p_71539_2_.equalsIgnoreCase(WorldSettings.GameType.CREATIVE.getName())
								&& !p_71539_2_.equalsIgnoreCase("c")
										? (!p_71539_2_.equalsIgnoreCase(WorldSettings.GameType.ADVENTURE.getName())
												&& !p_71539_2_.equalsIgnoreCase("a")
														? (!p_71539_2_.equalsIgnoreCase(
																WorldSettings.GameType.SPECTATOR.getName())
																&& !p_71539_2_.equalsIgnoreCase("sp")
																		? WorldSettings.getGameTypeById(parseInt(
																				p_71539_2_, 0,
																				WorldSettings.GameType.values().length
																						- 2))
																		: WorldSettings.GameType.SPECTATOR)
														: WorldSettings.GameType.ADVENTURE)
										: WorldSettings.GameType.CREATIVE)
						: WorldSettings.GameType.SURVIVAL;
	}

	public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
		return args.length == 1
				? getListOfStringsMatchingLastWord(args,
						new String[] { "survival", "creative", "adventure", "spectator" })
				: (args.length == 2 ? getListOfStringsMatchingLastWord(args, this.getListOfPlayerUsernames()) : null);
	}

	/**
	 * Returns String array containing all player usernames in the server.
	 */
	protected String[] getListOfPlayerUsernames() {
		return MinecraftServer.getServer().getAllUsernames();
	}

	/**
	 * Return whether the specified command parameter index is a username parameter.
	 */
	public boolean isUsernameIndex(String[] args, int index) {
		return index == 1;
	}
}
